问题 填空题

为了减缓二氧化碳使全球变暖的趋势,有些科学家提出大胆设想:将排放到空气中的二氧化碳压缩使其液化,然后将其压入到冰冷的深海中.但也有些科学家担心海水中富含二氧化碳后酸度会增加,可能会杀死一些海洋生物….请你回答下列问题:

①二氧化碳气体转变为液体时将会______能量(填“释放”或“消耗”);

②二氧化碳使海水酸度增加的原理用化学方程式表示为______;

③二氧化碳在深海中的溶解度比在通常状况在水中的溶解度______(填“大”或“小”),原因是______.

答案

(1)二氧化碳由气体转化为液体,可以将其中内能释放出来,因此液化过程是放热过程;故填:释放

(2)二氧化碳使海水酸度增加,是因为二氧化碳与水反应生成碳酸,其化学方程式为CO2+H2O=H2CO3

(3)气体的溶解度规律是:在温度一定时,压强越大气体溶解度越大;在压强一定时,温度越低气体溶解度越大.

故填:大、;压强大,温度低;

阅读理解

阅读文章,选择正确答案。

    "Hi, Mommy, what are you doing?" asked Susie.

    "I'm making a dinner for Mrs Smith next door," said her mother.

    "Why?" asked Susie, who was only six years old."Because Mrs Smith lost her daughter and she has a broken

heart. We need to take care of her for a little while."

    "Why, Mommy?"

    "You see, Susie, when someone is sad, they have trouble doing the little things like making dinner. Because

Mrs Smith won't ever be able to talk with her daughter or hug her or do all those wonderful things that mommies

and daughters do together. Maybe you'll think of some way to help take care of Mrs Smith."

    Susie thought seriously about how she could do her part in caring for Mrs Smith. A few minutes later, Susie

knocked on her door. Mrs Smith answered the knock with"Hi, Susie." Mrs Smith looked as though she might

have been crying." What can I do for you, Susie?" asked Mrs Smith."My mommy says that you lost your

daughter and you're very very sad with a broken heart." Susie held her hand out. In it was a Band-Aid (创可贴).

"This is for your broken heart," Mrs Smith chocked back her tears. She knelt and hugged Susie. Through her

tears she said, "Thank you, darling girl, this will help a lot."

    Mrs Smith accepted Susie's kindness. She bought a small key ring with a picture frame (相框). She put

Susie's Band-Aid in the frame to remind herself to heal a little every time she sees it.

1. Mrs Smith is ________. [ ]

A. Susie's neighbor

B. Susie's aunt

C. Susie mother's friend

D. Susie mother's workmate

2. The reason that Mrs Smith has a broken heart is that ________. [ ]

A. she is in poor health

B. she is in trouble

C. she lost her daughter

D. her husband died in a traffic accident

3. Susie's mother _______. [ ]

A. often plays with Mrs Smith together

B. is busy with her work every day

C. is good at cooking

D. is kind to others

4. From Susie's sending Mrs Smith a Band-Aid, we can see ________. [ ]

A. Susie knows the real meaning"a broken heart"

B. Susie doesn't know what "a broken heart" mean

C. Susie often uses a Band-Aid in her daily life

D. Susie thinks Band-Aid can do anything

5. The best title for this passage is ________. [ ]

A. Fixing her broken heart

B. A kind girl

C. Susie and her mother

D. A good neighbor

选择题